水利学报Issue(4)：443-449,7.DOI:10.13243/j.cnki.slxb.2014.04.009
进出水口位置对潜流人工湿地水力效率及死区分布的影响
Impacts of inlet-outlet configuration on hydraulic efficiency and dead zone in horizontal subsurface constructed wetland
摘要
Abstract
An artificial constructed wetland simalator was designed with three inlets and outlets which are respectively set at the top, middle and bottom on both sides. Nine inlet and outlet combinations were stud-ied. Retention time distribution curve were obtained using NaCl tracer test, which were used for hydraulic efficiency calculation and assessment for different inlet-outlet configurations. Moreover, dye tracer experi-ments were conducted to verify the hydraulic efficiency. Using a non-opaque reactor, sequential dye flow transition images were obtained. Image processing was made to analyze the flow trace propagation and dead zones distribution. The results indicate that bottom inlet-top outlet has the highest hydraulic efficiency com-paring with the lowest hydraulic efficiency for bottom inlet-bottom outlet configuration. Dye visualization shows the least area of dead zones for bottom inlet-top outlet configuration and the largest area of dead zones for bottom inlet-bottom outlet. There are significant impacts of the inlet-outlet configurations on hy-draulic retention time and dead zones distribution causing hydraulic efficiency changes. This may affect the contacts between pollutants and filter leading to the change of removal rate.关键词
人工湿地/水力效率/进出水口位置/死区分布/示踪实验Key words
Constructed wetlands/Hydraulic efficiency/Inleit-outlet configuration/Dead zone distribution/Tracer experiments分类
资源环境引用本文复制引用
宋新山,严登华,丁怡,王宇晖..进出水口位置对潜流人工湿地水力效率及死区分布的影响[J].水利学报,2014,(4):443-449,7.基金项目
国家自然科学基金资助项目 （）
